首页|Study on Stress and Strain Field of Mode II Quasi-static Growing Crack in Pressure-sensitive Dilatant Material
Study on Stress and Strain Field of Mode II Quasi-static Growing Crack in Pressure-sensitive Dilatant Material
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A mechanical model of the pressure-sensitive dilatant material is established in order to investigate the viscous effect in quasi-static growing crack-tip field. The constitutive equations on the pressure-sensitive dilatant material are deducted. Through asymptotic analysis, it is shown that in the stable creep growing stage, the elastic-deformation and the visco-deformation are equally dominant in the near-tip field, as r~(-1/(n-1)) . The asymptotic solutions of separative variable in the crack-tip field of plane stress mode II quasi-static are aslo obtained. According to numerical calculation, the curves of stress, strain and displacement in terms of various parameters are given. The asymptotic solutions of quasi-static growing crack-tip field gained here can conveniently degenerate the incompressible case, when the Poisson ratio v →0.5, named as HR field. The conclusions can provide the references for further studying the dynamic growing crack-tip field in the pressure-sensitive dilatant material.
pressure-sensitive dilatant materialstress and strain fieldquasi-static growing crack
Yong Yang、Li Ning、Liqiang Tang
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College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China
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